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Finding the Fourth Proportional to 57.91, 86.79 and 27.43

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Solution

The fourth proportional to 57.91, 86.79 and 27.43 is: 41.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.91 : 86.79 = 27.43 : x
  2. Step 2: Convert to fraction form
    57.91/86.79 = 27.43/x
  3. Step 3: Cross multiply
    57.91x = 86.79 × 27.43
  4. Step 4: Simplify right side
    57.91x = 2,380.86
  5. Step 5: Solve for x
    x = 2,380.86/57.91
  6. Step 6: Final answer
    x = 41.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.